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After migrating from apache 2.2 to 2.4 can't load perl module 

apache2: Syntax error on line 211 of /etc/apache2/apache2.conf: Syntax 
error on line 1 of /etc/apache2/mods-enabled/perl.load: Cannot load 
/usr/lib/apache2/modules/mod_perl.so into server: 
/usr/lib/apache2/modules/mod_perl.so: undefined symbol: ap_log_rerror

Apache is compiled on ubuntu 12.04. libapache2-mod-perl2-2.0.5-5ubuntu1 is installled on the system.

user1443543
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1 Answers1

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mod_perl needs binary compatibility with both the current versions of Apache and Perl. If you have upgraded either then you need to upgrade / recompile mod_perl itself.

Of course going forward, you may want to consider a less fragile FCGI configuration. Writing to a PSGI / Plack standard may help smooth any future change in this direction.

Extended discussion of the relative values of mod_perl / FCGI here.

tjd
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